Lesson 9 iNumbers Develop Understanding

Ready

Solve each system of equations.

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Set

Perform the indicated operations. Then identify whether your answer is rational and real, irrational and real, or complex.

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Indicate if the statement is true or false. If it is false, find a counter-example to prove the claim is false. ( Recall that a set of number is closed under an operation if it will always produce another number in the same set.)

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The set of irrational numbers is closed under addition.

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The set of integers is closed under addition and multiplication.

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The set of irrational numbers is closed under multiplication.

Go

Find the product of each pair of conjugates.

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Find the two complex solutions. Recall that: .

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